you use DVB ISP and this ISP provides internet connectivity with some
special daemon that may be also called "Internet accelerator" and this
accelerator acts as proxy. Globax is example of such an accelerator

Linux/iptables, OpenBSD/pf and FreeBSD/ipfw are supported.
Linux/iptables is well-tested, other implementations may have bugs,
your bugreports are welcome.

Another related issue is DNS over TCP. Redsocks includes `dnstc' that is fake
and really dumb DNS server that returns "truncated answer" to every query via
UDP. RFC-compliant resolver should repeat same query via TCP in this case - so
the request can be redirected using usual redsocks facilities.

On the other hand, DNS via TCP using bind9 may be painfully slow. If your bind9
setup is really slow, you have at least two options: pdnsd caching server
can run in TCP-only mode, ttdnsd (git repo) has no cache but can be useful for same
purpose.

Note about GID-based redirection

Keep in mind, that changed GID affects filesystem permissions, so if your
application creates some files, the files will be created with luser:socksified
owner/group. So, if you're not the only user in the group `socksified` and your
umask allows to create group-readable files and your directory permissions, and
so on, blah-blah, etc. THEN you may expose your files to another user.